18484871 has 2 divisors, whose sum is σ = 18484872. Its totient is φ = 18484870.

The previous prime is 18484859. The next prime is 18484889. The reversal of 18484871 is 17848481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18484871 - 2¹⁴ = 18468487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18484811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242435 + 9242436.

It is an arithmetic number, because the mean of its divisors is an integer number (9242436).

Almost surely, 2^18484871 is an apocalyptic number.

18484871 is a deficient number, since it is larger than the sum of its proper divisors (1).

18484871 is an equidigital number, since it uses as much as digits as its factorization.

18484871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57344, while the sum is 41.

The square root of 18484871 is about 4299.4035632864. The cubic root of 18484871 is about 264.4065085298.

The spelling of 18484871 in words is "eighteen million, four hundred eighty-four thousand, eight hundred seventy-one".